R.I. Gen. Laws § 23-19.15-7: Waiver.

The director may grant a waiver, to the extent necessary, from applicable provisions listed in § 23-19.15-6(b) provided the homeowner demonstrates undue hardship, defined as having an annual income of less than or equal to eighty percent (80%) of the appropriate household size area median income determined by the federal Housing and Urban Development standards for the community within which the cesspool is located, and the cesspool is not a failed system as defined herein. No waiver shall exceed five (5) years from the dates specified in § 23-19.15-6(b). Any waiver granted shall expire upon transfer or sale of the land or easement upon which the cesspool is located.